Date of Award


Degree Type


Degree Name

Master of Science (MS)


Microbiology and Immunology


Clean catch was developed before the advancement of more sensitive assays for culturing urinary bacteria. I reassessed clean catch, endeavoring to optimize this method. Periurethral swabs and voided urines were routinely collected, while analyzing different aspects of the method. I determined that midstream urine contained the least amount of vulvo-vaginal contamination and that the time of collection did not impact the results. I also determined that the use of antiseptic wipes prior to void increased the level of vulvo-vaginal contamination. A small cohort of females collected daily urines over a 17-day period and kept a strict alcohol diary. Females who participated in binge drinking showed an acute drop in urinary Lactobacillus following binge drinking. This study provides us with a protocol that generates reproducible data with periurethral swabs and voided urines. It also alerts us to life style factors or collection procedures that should be avoided prior to sample collection.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

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